These are various adapter / installation / mounting kits used for various Walbro fuel pumps, both internal and external.
400-791 Adapter Kit
400-857 Adapter Kit (for 3000GT/Stealth)
400-939 Adapter Kit (for external pumps)
128-3039 Adapter to AN6 for External Pumps
122-3325 - 60mm Sleeve - Insulator for Pump External Internal
All kits sold as pictured - as a kit or individual component. Pumps are NOT included - these are JUST the adapter/installation/mounting kits.